Data Validation in MVC

Validation using Data Annotation Attributes

ASP.NET MVC includes built-in attribute classes in the System.ComponentModel.DataAnnotations namespace. These attributes are used to define metadata for ASP.NET MVC and ASP.NET data controls. You can apply these attributes to the properties of the model class to display appropriate validation messages to the users.

The following table lists all the data annotation attributes which can be used for validation.

Attribute	Usage
Required	Specifies that a property value is required.
StringLength	Specifies the minimum and maximum length of characters that are allowed in a string type property.
Range	Specifies the numeric range constraints for the value of a property.
RegularExpression	Specifies that a property value must match the specified regular expression.
CreditCard	Specifies that a property value is a credit card number.
CustomValidation	Specifies a custom validation method that is used to validate a property.
EmailAddress	Validates an email address.
FileExtension	Validates file name extensions.
MaxLength	Specifies the maximum length of array or string data allowed in a property.
MinLength	Specifies the minimum length of array or string data allowed in a property.
Phone	Specifies that a property value is a well-formed phone nu